Source code: com/act365/net/ip/IP4Message.java
1 /*
2 * JSocket Wrench
3 *
4 * Copyright (C) act365.com October 2003
5 *
6 * Web site: http://www.act365.com/wrench
7 * E-mail: developers@act365.com
8 *
9 * The JSocket Wrench library adds support for low-level Internet protocols
10 * to the Java programming language.
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the Free
14 * Software Foundation; either version 2 of the License, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
20 * Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License along with
23 * this program; if not, write to the Free Software Foundation, Inc.,
24 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27 package com.act365.net.ip ;
28
29 /**
30 Stores the contents of an IP4 message.
31 */
32
33 public class IP4Message {
34
35 public byte version ;
36 public byte headerlength ;
37 public byte typeofservice ;
38 public short length ;
39 public short identifier ;
40 public byte flags ;
41 public short offset ;
42 public short timetolive ;
43 public byte protocol ;
44 public short checksum ;
45 public byte[] source ;
46 public byte[] destination ;
47 public int[] options ;
48 public byte[] data ;
49
50 /**
51 Writes the message to a string.
52 */
53
54 public String toString() {
55
56 StringBuffer sb = new StringBuffer();
57
58 sb.append("IP: source-");
59 sb.append( source[0] );
60 sb.append('.');
61 sb.append( source[1] );
62 sb.append('.');
63 sb.append( source[2] );
64 sb.append('.');
65 sb.append( source[3] );
66 sb.append(" destination-");
67 sb.append( destination[0] );
68 sb.append('.');
69 sb.append( destination[1] );
70 sb.append('.');
71 sb.append( destination[2] );
72 sb.append('.');
73 sb.append( destination[3] );
74 sb.append(" length-");
75 sb.append( length );
76 sb.append(" bytes");
77
78 return sb.toString();
79 }
80 }
81